At the end of World War II, huge swaths of Europe and Asia had been reduced to ruins. Borders were redrawn and homecomings, expulsions, and burials were under way. But the massive efforts to rebuild had just begun. When the war began in the late 1930s, the world’s population was approximately 2 billion. In less than a decade, the war between the Axis the Allied powers had resulted in 80 million deaths — killing off about 4 percent of the whole world. Allied forces now became occupiers, taking control of Germany, Japan, and much of the territory they had formerly ruled. Efforts were made to permanently dismantle the war-making abilities of those nations, as factories were destroyed and former leadership was removed or prosecuted. War crimes trials took place in Europe and Asia, leading to many executions and prison sentences. Millions of Germans and Japanese were forcibly expelled from territories they called home.